Hitachi DH 24DVA Handling Instructions Manual Download

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(2) Regarding the temperatures of the rechargeable

battery.
The temperatures for rechargeable batteries are as
shown in the

table 2

, and batteries that have become

hot should be cooled for a while before being
recharged.

Table 2

(3) Regarding recharging time

Depending on the type of the battery, the charging
time will become as shown in

Table 3

Charging time (At 20°C)

NOTE:

The charging time may vary according to ambient
temperature and power source voltage.

4. Disconnect the charger’s power cord from the

receptacle.

5. Hold the charger firmly and pull out the battery.
NOTE:

After operation, pull out batteries from the charger
first, and then keep the batteries properly.

Regarding electric discharge in case of new batteries,
etc.

As the internal chemical substance of new batteries and
batteries that have not been used for an extended period
is not activated, the electric discharge might be low when
using them the first and second time. This is a temporary
phenomenon, and normal time required for recharging
will be restored by recharging the batteries 2–3 times.

Lights for 0.5 seconds. Does not light for 0.5
seconds. (off for 0.5 seconds)

Lights continuously

Lights for 0.5 seconds. Does not light for 0.5
seconds. (off for 0.5 seconds)

Lights for 0.1 seconds. Does not light for 0.1
seconds. (off for 0.1 seconds)

Lights continuously

Before charging

While charging

Charging complete

Charging impossible

Blinks
(RED)

Lights
(RED)

Blinks
(RED)

Lights
(GREEN)

Malfunction in the
battery or the charger

The battery temperature
is high, making recharg-
ing impossible.

Table 1

Indications of the pilot lamp

Temperatures at

Battery type

which the battery
can be recharged

EB2420

–5°C – 60°C

EB2430HA, EB2433X

0°C – 45°C

How to make the batteries perform longer

(1) Recharge the batteries before they become

completely exhausted.
When you feel that the power of the tool becomes
weaker, stop using the tool and recharge its battery.
If you continue to use the tool and exhaust the
electric current, the battery may be damaged and
its life will become shorter.

(2) Avoid recharging at high temperatures.

A rechargeable battery will be hot immediately after
use. If such a battery is recharged immediately after
use, its internal chemical substance will deteriorate,
and the battery life will be shortened. Leave the
battery and recharge it after it has cooled for a
while.

CAUTION:

䡬

If the battery has been heated right after operation
(or due to sunlight, etc.), the charger’s pilot lamp
may not light in red. In such a case, first let the
battery cool, then start charging.

䡬

When the pilot lamp flikers in red (at 0.2–second
intervals), check for and take out any foreign objects
in the charger’s battery installation hole. If there are
no foreign objects, it is probable that the battery
or charger is malfunctioning. Take it to your
authorized Service Center.

䡬

Since the built-in micro computer takes about 3
seconds to confirm that the battery being charged
with UC24YFB is taken out, wait for a minimum of
3 seconds before reinserting it to continue charging.
If the battery is reinserted within 3 seconds, the
battery may not be properly charged.

PRIOR TO OPERATION

1. Mounting the drill bit (Fig. 4, 5)
CAUTION:

To prevent accidents, make sure to turn the switch
off.

NOTE:

When using tools such as drill bits, etc., make sure
to use the genuine parts designated by our company.

Battery type

Recharging time

EB2420

Approx. 50 min.

EB2430HA

Approx. 70 min.

EB2433X